Determining an Antenna Panel for Sidelink Transmission

2. The method of claim 1, wherein performing the plurality of sidelink transmissions with the different spatial directions comprises: transmitting each sidelink transmission of the plurality of sidelink transmissions from one of the plurality of antenna panels in different slots using a beam sweeping operation or transmitting each sidelink transmission of the plurality of sidelink transmissions from one of the plurality of antenna panels in the same slot using a multi-beam operation.

3. The method of claim 1, wherein performing the plurality of sidelink transmissions with the different spatial directions comprises: performing a sidelink data transmission or a sidelink control transmission, or both, and wherein the sidelink reference signal is embedded in the sidelink data transmission or the sidelink control transmission.

4. The method of claim 1, further comprising indicating the respective antenna panel identity by embedding a panel identifier in each transmission having a different spatial direction.

5. The method of claim 4, wherein each transmission having a different spatial direction comprises a respective sidelink reference signal, and wherein indicating the respective antenna panel identity comprises embedding the panel identifier within the respective sidelink reference signal.

6. The method of claim 4, wherein indicating the respective antenna panel identity comprises inserting the panel identifier in a control element header or sidelink control information corresponding to a sidelink data transmission.

7. The method of claim 1, wherein the feedback transmission indicates a particular antenna panel of the plurality of antenna panels, and wherein the indication of the particular antenna panel comprises at least one of: a panel identifier, a beam identifier, and a sidelink reference signal identifier.

11. The UE of claim 9, wherein to perform the plurality of sidelink transmissions with the different spatial directions, the at least one processor is configured to cause the UE to perform a sidelink data transmission or a sidelink control transmission, or both, and wherein the sidelink reference signal is embedded in the sidelink data transmission or the sidelink control transmission.

12. The UE of claim 9, wherein the at least one processor is configured to cause the UE to indicate the respective antenna panel identity by embedding a panel identifier in each transmission having a different spatial direction.

13. The UE of claim 12, wherein each transmission having a different spatial direction comprises a respective sidelink reference signal, and wherein to indicate the respective antenna panel identity, the at least one processor is configured to cause the UE to embedding the panel identifier within the respective sidelink reference signal.

14. The UE of claim 12, wherein to indicate the respective antenna panel identity, the at least one processor is configured to cause the UE to insert the panel identifier in a control element header or sidelink control information corresponding to a sidelink data transmission.

15. The UE of claim 9, wherein the feedback transmission indicates a particular antenna panel of the plurality of antenna panels, and wherein the indication of the particular antenna panel comprises at least one of: a panel identifier, a beam identifier, and a sidelink reference signal identifier.

19. The processor of claim 17, wherein to perform the plurality of sidelink transmissions with the different spatial directions, the at least one controller is configured to cause the processor to perform a sidelink data transmission or a sidelink control transmission, or both, and wherein the sidelink reference signal is embedded in the sidelink data transmission or the sidelink control transmission.